American Models GP-35 TMCC
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|I picked up this used GP-35. It started life in
C&O paint. Now here it is repainted in Pennsy colors to fit in my
So I had to convert it to TMCC as well.
|I drilled out the marker lights and installed LEDs
The Number boards and headlights are working also.
|The loco uses an ERR Mini Commander with Loco
firmware. It is programmed as a type 6 so the lighting is
directional. I made a heatsink to mount it to the chassis. The
flywheel has to be removed to make room for the board. Therefore I also
used the low speed gearing available from American Models
The loco is also equipped with the new RailSounds board from ERR. It was a very tight fit but it worked out.
I made a mounting bracket from sheet brass and used 1/16" foam tape to mount the board. I trimmed any protruding component leads on the board so they would not pierce the foam and short out.
|The board has to be carefully centered on the mount
to clear the drive shaft. The clearances are tight. I used a 2 pin
connector set for the lighting wiring so the shell can be fully removed.
|The motor has to be rotated 90 degrees so the connections are vertical for clearances. The motor was also moved forward 1/16" to clear the sound board."|
|The speaker is mounted in the Cab roof. The Cab
snaps off and makes the installation easier. A hole was drilled behind
the headlight lenses for a 3mm LED and wired before the speaker was
A board was added for the front marker lighting too.
|Here is the rear lighting board that has the
marker, headlight and number board lighting.
|The top of the shell comes off and made a good place to stash the lighting wiring so it was out of the way.|
|I changed the couplers to SHS SW-9 pocket couplers. This will make conversion to Kadee couplers easy later.|
Here is is on the layout. Looks right at home.